<http://schema.org/headline>
"\u66AE\u3089\u3057\u3092\u307F\u306A\u304A\u3059\u7B2C\u4E00\u6B69\u306B\uFF1A\u65B0\u520A\u30D4\u30C3\u30AF\u30A2\u30C3\u30D7"^^<http://www.w3.org/2001/XMLSchema#string>
<http://gihyo.jp/book/pickup/2012/0008>